Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse? a) they inhibit the action potential causing it to stop b) Calcium channels have no role in this process c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft
Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse?
Correct option of the question is "E".
Synapse are form between presynaptic terminal of a neuron and post-synaptic membrane of next neuron. Pre-synaptic membrane has vesicles packed with neurotransmitters. Neurotransmitters are the chemical which transmit impulse from one neuron to another neuron.
As impulse of nerve fibre reach to presynaptic membrane it led to opening of calcium channels and calcium enter in presynaptic terminal, this entry of Ca++ ion promote fusion of neurotransmitter vesicles with presynaptic membrane, and release neurotransmitter to synaptic cleft.in synaptic cleft synaptic fluid filled which work as medium for neurotransmitter movement and it bind with receptor of post synaptic membrane and impulse transmitted to next neuron.
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